Yes. Anything you do, even if it's just watching TV or sitting quietly requires energy. Your heart keeps pumping, you keep breathing- that requires energy.
Eating, sleeping, and having sex.
No, sleeping is not related to form of energy. Though, while sleeping, body would go through sequence of chemical energy change to repair our cells.
breathing blood pumping brain activity stomach activity kidney and liver activity
We need energy while sleeping because our heart is beating and we are living.
No. You can't normally eat while sleeping. While you're asleep your body does require some energy to continue functioning, but what you've eaten during the day normally is more than sufficient for you.*Note: some sleepwalkers actually do eat while "sleeping", they're not actually asleep but in a self-induced catatonic (or hypnotic) state, and not fully aware of what they are doing.
They get their energy by sleeping
Suprisingly you actually use more energy when you are sleeping then when you are awake.
no it does not require energy.
endothermic reactions require energy
All of your cells require energy. Without energy you wouldn't be alive.
thinking, dreaming require energy
All living organisms (not dead) require energy